Arsenal and Chelsea gave their UEFA Europa League prospects a boost by earning victories in their quarter-final first legs.
The Gunners gave a strong performance at Emirates Stadium where they produced a 2-0 win over Serie A side Napoli.
Aaron Ramsey completed a sweeping move with a 15th-minute opening goal and Kalidou Koulibaly misdirected Lucas Torreira’s strike past his own goalkeeper 10 minutes later to give Arsenal a healthy two-goal lead to take to Naples on 18 April.
See: Arsenal report
Chelsea left it late to edge ahead in their away tie with Slavia Prague, but Marcos Alonso’s stooping header from Willian's cross four minutes from time gave them a 1-0 advantage to defend at Stamford Bridge next Thursday.
Before then Maurizio Sarri's side resume their race for a top-four finish in the Premier League at leaders Liverpool on Sunday, while Arsenal travel to Watford on Monday night.
See: Chelsea report